package com.cucn.educenter.mapper;

import com.cucn.educenter.entity.UcenterMember;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;

/**
 * <p>
 * 会员表 Mapper 接口
 * </p>
 *
 * @author KouChaoJie
 * @since 2021-10-10
 */
public interface UcenterMemberMapper extends BaseMapper<UcenterMember> {

    /**
     * 根据日期查询注册人数
     *
     * @param day 日期
     * @return 注册人数
     */
    Integer countRegisterDay(String day);
}
